I think with the addition of an “ignore user” option, there really wouldn’t be any reason to have rules beyond the permaban ones. If you can /ignore them, script spammers aren’t even a problem.

But splitting IDC in half: one section for RP (i.e. anything goes) and one section for non-RP (rules apply here) would be reasonable, and in keeping with the forums. Just make it so that people can see both sections if they like (tabbed chat?), and there’s no problem.